./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:00:05,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:00:05,276 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:00:05,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:00:05,283 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:00:05,331 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:00:05,331 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:00:05,332 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:00:05,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:00:05,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:00:05,339 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:00:05,339 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:00:05,340 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:00:05,342 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:00:05,342 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:00:05,342 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:00:05,343 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:00:05,343 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:00:05,344 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:00:05,360 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:00:05,361 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:00:05,361 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:00:05,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:00:05,363 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:00:05,364 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:00:05,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:00:05,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:00:05,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:00:05,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:00:05,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:00:05,367 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:00:05,367 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:00:05,368 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:00:05,368 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:00:05,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:00:05,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:00:05,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:00:05,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:05,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:00:05,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:00:05,370 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:00:05,370 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:00:05,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:00:05,371 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:00:05,371 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:00:05,372 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:00:05,372 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:00:05,372 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 [2023-11-25 00:00:05,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:00:05,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:00:05,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:00:05,703 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:00:05,704 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:00:05,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2023-11-25 00:00:08,830 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:00:09,206 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:00:09,206 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2023-11-25 00:00:09,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/data/429e01963/5f242db4a9be42e3ab2333e8d24ef9a6/FLAG3c1debf4d [2023-11-25 00:00:09,230 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/data/429e01963/5f242db4a9be42e3ab2333e8d24ef9a6 [2023-11-25 00:00:09,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:00:09,235 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:00:09,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:09,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:00:09,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:00:09,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb75edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09, skipping insertion in model container [2023-11-25 00:00:09,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,269 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:00:09,447 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2023-11-25 00:00:09,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:09,483 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:00:09,496 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2023-11-25 00:00:09,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:00:09,524 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:00:09,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09 WrapperNode [2023-11-25 00:00:09,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:00:09,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:09,527 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:00:09,527 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:00:09,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,564 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2023-11-25 00:00:09,565 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:00:09,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:00:09,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:00:09,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:00:09,574 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,578 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,591 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,592 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:00:09,596 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:00:09,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:00:09,596 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:00:09,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (1/1) ... [2023-11-25 00:00:09,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:00:09,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:09,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:00:09,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:00:09,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:00:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:00:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:00:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:00:09,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:00:09,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:00:09,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:00:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:00:09,775 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:00:09,778 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:00:10,051 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:00:10,134 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:00:10,134 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-25 00:00:10,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:10 BoogieIcfgContainer [2023-11-25 00:00:10,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:00:10,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:00:10,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:00:10,149 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:00:10,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:00:09" (1/3) ... [2023-11-25 00:00:10,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78512586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:10, skipping insertion in model container [2023-11-25 00:00:10,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:00:09" (2/3) ... [2023-11-25 00:00:10,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78512586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:00:10, skipping insertion in model container [2023-11-25 00:00:10,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:00:10" (3/3) ... [2023-11-25 00:00:10,155 INFO L112 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2023-11-25 00:00:10,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:00:10,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:00:10,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:00:10,225 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3399dd45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:00:10,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:00:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-25 00:00:10,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:10,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:10,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:10,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -447013836, now seen corresponding path program 1 times [2023-11-25 00:00:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:10,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855390796] [2023-11-25 00:00:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:10,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:10,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:00:10,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111735567] [2023-11-25 00:00:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:10,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:10,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:10,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:10,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:00:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:10,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:00:10,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:10,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:00:10,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855390796] [2023-11-25 00:00:10,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:00:10,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111735567] [2023-11-25 00:00:10,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111735567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:10,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:00:10,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056958414] [2023-11-25 00:00:10,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:00:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:00:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:10,686 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:10,772 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2023-11-25 00:00:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:00:10,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-25 00:00:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:10,783 INFO L225 Difference]: With dead ends: 29 [2023-11-25 00:00:10,784 INFO L226 Difference]: Without dead ends: 17 [2023-11-25 00:00:10,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:00:10,792 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:10,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-25 00:00:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-11-25 00:00:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2023-11-25 00:00:10,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 8 [2023-11-25 00:00:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:10,831 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2023-11-25 00:00:10,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2023-11-25 00:00:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-25 00:00:10,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:10,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:10,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:11,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:11,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:11,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1873324509, now seen corresponding path program 1 times [2023-11-25 00:00:11,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:11,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258713495] [2023-11-25 00:00:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:11,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:00:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398828503] [2023-11-25 00:00:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:11,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:11,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:11,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:00:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:11,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:00:11,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:11,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:00:11,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258713495] [2023-11-25 00:00:11,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:00:11,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398828503] [2023-11-25 00:00:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398828503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:11,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:11,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033575657] [2023-11-25 00:00:11,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:11,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:00:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:00:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:00:11,195 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:11,269 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2023-11-25 00:00:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:00:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-25 00:00:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:11,271 INFO L225 Difference]: With dead ends: 40 [2023-11-25 00:00:11,271 INFO L226 Difference]: Without dead ends: 27 [2023-11-25 00:00:11,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:00:11,274 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:11,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-25 00:00:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2023-11-25 00:00:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2023-11-25 00:00:11,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2023-11-25 00:00:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:11,282 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2023-11-25 00:00:11,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2023-11-25 00:00:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-25 00:00:11,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:11,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:11,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:11,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:11,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:11,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -530077028, now seen corresponding path program 1 times [2023-11-25 00:00:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:11,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621926230] [2023-11-25 00:00:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:11,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:11,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:00:11,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644532280] [2023-11-25 00:00:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:11,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:11,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:11,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:00:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:11,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:00:11,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:11,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:00:11,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621926230] [2023-11-25 00:00:11,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:00:11,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644532280] [2023-11-25 00:00:11,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644532280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:11,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:00:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:00:11,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944662726] [2023-11-25 00:00:11,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:11,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:00:11,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:11,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:00:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:00:11,618 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:11,688 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-11-25 00:00:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:00:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-25 00:00:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:11,689 INFO L225 Difference]: With dead ends: 43 [2023-11-25 00:00:11,690 INFO L226 Difference]: Without dead ends: 27 [2023-11-25 00:00:11,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:00:11,692 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:11,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-25 00:00:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2023-11-25 00:00:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2023-11-25 00:00:11,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2023-11-25 00:00:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:11,702 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2023-11-25 00:00:11,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2023-11-25 00:00:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-25 00:00:11,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:11,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:11,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:11,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:11,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:11,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash -369554003, now seen corresponding path program 1 times [2023-11-25 00:00:11,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:11,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286847934] [2023-11-25 00:00:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:11,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:11,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:00:11,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033827189] [2023-11-25 00:00:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:11,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:11,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:11,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:00:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:12,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:00:12,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:12,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:00:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:00:12,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:12,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286847934] [2023-11-25 00:00:12,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:00:12,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033827189] [2023-11-25 00:00:12,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033827189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:00:12,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848916454] [2023-11-25 00:00:12,103 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-25 00:00:12,103 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:00:12,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:00:12,113 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:00:12,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:00:13,600 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:00:13,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [848916454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:00:13,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:00:13,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2023-11-25 00:00:13,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537318379] [2023-11-25 00:00:13,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:00:13,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:00:13,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:13,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:00:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:00:13,894 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:14,185 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-11-25 00:00:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:00:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-25 00:00:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:14,188 INFO L225 Difference]: With dead ends: 35 [2023-11-25 00:00:14,189 INFO L226 Difference]: Without dead ends: 25 [2023-11-25 00:00:14,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:00:14,200 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:14,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-25 00:00:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-11-25 00:00:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-11-25 00:00:14,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2023-11-25 00:00:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:14,219 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-11-25 00:00:14,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-11-25 00:00:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-25 00:00:14,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:14,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:14,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:14,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:14,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1267804040, now seen corresponding path program 1 times [2023-11-25 00:00:14,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:14,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456605656] [2023-11-25 00:00:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:14,439 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:00:14,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465442559] [2023-11-25 00:00:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:14,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:14,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:14,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:14,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:00:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:00:14,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:00:14,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:00:14,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:00:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:00:14,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456605656] [2023-11-25 00:00:14,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:00:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465442559] [2023-11-25 00:00:14,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465442559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:00:14,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655713082] [2023-11-25 00:00:14,586 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-25 00:00:14,587 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:00:14,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:00:14,587 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:00:14,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:00:16,692 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:00:16,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '686#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)))' at error location [2023-11-25 00:00:16,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:00:16,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:00:16,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-25 00:00:16,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375796416] [2023-11-25 00:00:16,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:00:16,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:00:16,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:00:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:00:16,931 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:17,106 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2023-11-25 00:00:17,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:00:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-25 00:00:17,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:17,108 INFO L225 Difference]: With dead ends: 64 [2023-11-25 00:00:17,108 INFO L226 Difference]: Without dead ends: 44 [2023-11-25 00:00:17,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:00:17,113 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:17,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 18 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-25 00:00:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-11-25 00:00:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-11-25 00:00:17,137 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2023-11-25 00:00:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:17,137 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-11-25 00:00:17,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-11-25 00:00:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:00:17,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:17,140 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:17,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:17,353 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:17,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash 253462015, now seen corresponding path program 2 times [2023-11-25 00:00:17,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:17,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724131903] [2023-11-25 00:00:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:17,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:17,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:00:17,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238186879] [2023-11-25 00:00:17,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:00:17,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:17,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:17,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:00:17,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:00:17,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:00:17,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:00:17,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:00:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-25 00:00:17,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:00:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-25 00:00:17,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:00:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724131903] [2023-11-25 00:00:17,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:00:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238186879] [2023-11-25 00:00:17,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238186879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:00:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005285012] [2023-11-25 00:00:17,609 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-25 00:00:17,610 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:00:17,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:00:17,610 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:00:17,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:00:19,099 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:00:19,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1015#(and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~m~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_~max~0#1| 1) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)))' at error location [2023-11-25 00:00:19,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:00:19,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:00:19,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-25 00:00:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159148970] [2023-11-25 00:00:19,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:00:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:00:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:00:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:00:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:00:19,361 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:00:19,549 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2023-11-25 00:00:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:00:19,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-25 00:00:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:00:19,552 INFO L225 Difference]: With dead ends: 167 [2023-11-25 00:00:19,553 INFO L226 Difference]: Without dead ends: 140 [2023-11-25 00:00:19,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:00:19,554 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:00:19,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 28 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:00:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-25 00:00:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2023-11-25 00:00:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 84 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2023-11-25 00:00:19,586 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 24 [2023-11-25 00:00:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:00:19,586 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2023-11-25 00:00:19,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:00:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2023-11-25 00:00:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-25 00:00:19,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:00:19,590 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:00:19,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:00:19,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:19,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:00:19,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:00:19,797 INFO L85 PathProgramCache]: Analyzing trace with hash -431160992, now seen corresponding path program 3 times [2023-11-25 00:00:19,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:00:19,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692676782] [2023-11-25 00:00:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:00:19,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:00:19,825 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:00:19,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120653544] [2023-11-25 00:00:19,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:00:19,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:00:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:00:19,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:00:19,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb323b30-2ff5-4fe7-9e95-3a96a43146da/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:00:20,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:00:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:00:20,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-25 00:00:20,013 INFO L285 TraceCheckSpWp]: Computing forward predicates...